1099581242 has 8 divisors (see below), whose sum is σ = 1676410932. Its totient is φ = 540777600.

The previous prime is 1099581221. The next prime is 1099581257. The reversal of 1099581242 is 2421859901.

It can be written as a sum of positive squares in 2 ways, for example, as 999761161 + 99820081 = 31619^2 + 9991^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1099581242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4506359 + ... + 4506602.

Almost surely, 2^1099581242 is an apocalyptic number.

1099581242 is a deficient number, since it is larger than the sum of its proper divisors (576829690).

1099581242 is an equidigital number, since it uses as much as digits as its factorization.

1099581242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9013024.

The product of its (nonzero) digits is 51840, while the sum is 41.

The square root of 1099581242 is about 33159.9342882340. The cubic root of 1099581242 is about 1032.1491062375.

The spelling of 1099581242 in words is "one billion, ninety-nine million, five hundred eighty-one thousand, two hundred forty-two".